inert gas - Article Index

Encyclopedia - Fire Triangle: Encyclopedia Ii - Fire Triangle - Fire Tetrahedron
The fire triangle is a useful teaching tool, but fails to identify the fourth essential element of fire: the sustaining chemical reaction...   » Read the article

Encyclopedia - Breathing Gas: Encyclopedia - Breathing Gas
Air is the most common and only natural breathing gas. Other artificial gases, either pure gases or mixtures of gases, are used in enclos...   » Read the article

Encyclopedia - Aerogel: Encyclopedia - Aerogel
Aerogel is a solid-state substance similar to gel where the liquid component is replaced with gas. The result is an extremely low density...   » Read the article

Encyclopedia - Arc Welding: Encyclopedia - Arc Welding
Arc welding refers to a group of welding processes that use a welding power supply to create an electric arc between an electrode and the...   » Read the article

Encyclopedia - Welding: Encyclopedia - Welding
Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by me...   » Read the article

Encyclopedia - Inerting System: Encyclopedia Ii - Inerting System - Use In Military Aircraft
Inerting systems have been used in military aircraft starting with a 1950 version of the United States' B-47 bomber jet, which sublimated...   » Read the article

Encyclopedia - Ferrocene: Encyclopedia Ii - Ferrocene - Chemical Properties
Ferrocene undergoes many reactions characteristic of aromatic compounds, notably Friedel-Crafts reactions. In an illustrative undergradua...   » Read the article

Encyclopedia - Dry Cask Storage: Encyclopedia Ii - Dry Cask Storage - History
In the late 1970s and early 1980s, the need for alternative storage began to grow when pools at many nuclear reactors began to fill up wi...   » Read the article

Encyclopedia - Coulometry: Encyclopedia Ii - Coulometry - Applications
Potentiostatic coulometry techniques have been used to determine over 50 elements. They are used very frequently for the determination of...   » Read the article

Encyclopedia - Welding: Encyclopedia Ii - Welding - Welding Processes
Welding - Arc welding. Arc welding processes use a welding power supply to create and maintain an electric arc between an electrode and...   » Read the article

Encyclopedia - Relay: Encyclopedia Ii - Relay - Protection Relay
A protection relay is a complex electromechanical apparatus, often with more than one coil, designed to calculate operating conditions on...   » Read the article

Encyclopedia - Decompression Sickness: Encyclopedia Ii - Decompression Sickness - Introduction
Decompression sickness can happen in any of the following situations: A diver ascends from a dive. An unpressurized aircraft flies upwar...   » Read the article

Encyclopedia - Pebble Bed Reactor: Encyclopedia Ii - Pebble Bed Reactor - Basic Design
The reactor provides heat, which is used to turn a generator. However, there are a number of different design choices. The uranium, thori...   » Read the article

Encyclopedia - Aerogel: Encyclopedia Ii - Aerogel - Uses
There are a variety of tasks for which aerogels are used. Commercially, aerogels have been used in granular form to add insulation to sky...   » Read the article

Encyclopedia - Wave Soldering: Encyclopedia Ii - Wave Soldering - Fluxing
The PCB will then enter the fluxing zone, which applies flux to the underside of the board. Two types of fluxers are used: the spray flux...   » Read the article

Encyclopedia - Arc Welding: Encyclopedia Ii - Arc Welding - Development
While examples of welding go back to the Bronze Age and the Iron Age, arc welding did not come into practice until much later. In 1800, S...   » Read the article

Encyclopedia - Breathing Gas: Encyclopedia Ii - Breathing Gas - Individual Component Gases
Breathing gas - Oxygen. Oxygen (O2) must be present in every breathing gas. This is because it is essential to the human body's metabol...   » Read the article

Encyclopedia - Coulometry: Encyclopedia Ii - Coulometry - Coulometric Titration
Coulometric titrations use a constant current system to perform the reaction. The only measurements required in these systems is the time...   » Read the article

Encyclopedia - Coulometry: Encyclopedia Ii - Coulometry - Potentiostatic Coulometry
Potentiostatic coulometry involves keeping the electrochemical potential at the working electrode (the electrode involved in the reaction...   » Read the article

Encyclopedia - Wave Soldering: Encyclopedia Ii - Wave Soldering - Cleaning
Some types of flux, called "no-clean" fluxes, do not require cleaning; their residues are benign after the soldering process. Others, how...   » Read the article

Encyclopedia - Wave Soldering: Encyclopedia Ii - Wave Soldering - Soldering
The tank of molten solder has a pattern of standing waves (or, in some cases, intermittent waves) on its surface. When the PCB is moved o...   » Read the article

Encyclopedia - Wave Soldering: Encyclopedia Ii - Wave Soldering - Fixtures
The printed circuit board with through-hole components on top of the board and/or surface mount components glued on the bottom side are s...   » Read the article

Encyclopedia - Pebble Bed Reactor: Encyclopedia Ii - Pebble Bed Reactor - Safety Features
When a pebble-bed reactor gets hotter, the more rapid motion of the atoms in the fuel decreases the probability of neutron capture by 235...   » Read the article

Encyclopedia - Wave Soldering: Encyclopedia Ii - Wave Soldering - Preheating
The PCB will then enter the preheating zone. The preheating zone consists of convection heaters which blow hot air onto the PCB to increa...   » Read the article

Encyclopedia - Wave Soldering: Encyclopedia Ii - Wave Soldering - Wave Solder Process
There are many types of wave solder machines, however the basic components and principles of these machines are the same. A standard wave...   » Read the article

Encyclopedia - Welding: Encyclopedia Ii - Welding - Geometry
Welds can be geometrically prepared in many different ways. The five basic types of weld joints are the butt joint, lap joint, corner joi...   » Read the article

Encyclopedia - Arc Welding: Encyclopedia Ii - Arc Welding - Consumable Electrode Methods
One of the most common types of arc welding is shielded metal arc welding (SMAW), which is also known as manual metal arc welding (MMA) o...   » Read the article

Encyclopedia - Arc Welding: Encyclopedia Ii - Arc Welding - Non-consumable Electrode Methods
Gas tungsten arc welding (GTAW), or tungsten inert gas (TIG) welding, is a manual welding process that uses a non-consumable electrode ma...   » Read the article

Encyclopedia - Arc Welding: Encyclopedia Ii - Arc Welding - Power Supplies
To supply the electrical energy necessary for arc welding processes, a number of different power supplies can be used. The most common cl...   » Read the article

Encyclopedia - Aerogel: Encyclopedia Ii - Aerogel - Production
Silica aerogel is made by drying a hydrogel composed of colloidal silica in an extreme environment. Specifically, the process starts with...   » Read the article

Encyclopedia - Aerogel: Encyclopedia Ii - Aerogel - Properties
Aerogel is composed of 99.8% air with a typical density of 3 mg/cm3. It feels like hard foam. Pressing softly won't leave any mark; press...   » Read the article

Encyclopedia - Aerogel: Encyclopedia Ii - Aerogel - Silica Aerogel
Silica aerogel is the most common type of aerogel and the most extensively studied and used. It is a silica-based substance and the world...   » Read the article

Encyclopedia - Arc Welding: Encyclopedia Ii - Arc Welding - Corrosion Issues
Some materials, notably high-strength steels, aluminium, and titanium alloys, are susceptible to hydrogen embrittlement. If the electrode...   » Read the article

Encyclopedia - Breathing Gas: Encyclopedia Ii - Breathing Gas - Unwelcome Components Of Breathing Gases
Many gases are not suitable for use in diving breathing gases. Here is an incomplete list. Breathing gas - Argon. Argon (Ar) is an iner...   » Read the article

Encyclopedia - Welding: Encyclopedia Ii - Welding - Safety Issues
Welding, without the proper precautions, can be a dangerous and unhealthy practice. However, with the use of new technology and proper pr...   » Read the article

Encyclopedia - Welding: Encyclopedia Ii - Welding - Costs And Trends
As an industrial process, the cost of welding plays a crucial role in manufacturing decisions. Many different variables affect the total ...   » Read the article

Encyclopedia - Welding: Encyclopedia Ii - Welding - Quality
Most often, the major metric used for judging the quality of a weld is its strength and the strength of the material around it. Many dist...   » Read the article

Encyclopedia - Welding: Encyclopedia Ii - Welding - History
The history of joining metals goes back several millennia, with the earliest examples of welding from the Bronze Age and the Iron Age in ...   » Read the article

Encyclopedia - Decompression Sickness: Encyclopedia Ii - Decompression Sickness - Signs And Symptoms
Bubbles can form anywhere in the body, but symptomatic sensation is most frequently observed in the shoulders, elbows, knees, and ankles....   » Read the article

Encyclopedia - Decompression Sickness: Encyclopedia Ii - Decompression Sickness - Treatment
Recompression is the only effective treatment for severe DCS, although rest and oxygen (increasing the percentage of oxygen in the air be...   » Read the article

Encyclopedia - Relay: Encyclopedia Ii - Relay - Operation
When a current flows through the coil, the resulting magnetic field attracts an armature that is mechanically linked to a moving contact....   » Read the article